DE102012208807A1 - Rolling bearing of speed gear for motor vehicle transmission, has roller bearing cagethat is formed of radially circumferential projection between rows of cage pockets containing rolling elements - Google Patents

Abstract

The bearing (1) has a roller bearing plastic cage (12) that comprises an inner ring (3) which is provided on a radially circumferential groove (5) formed on a carrier (7). A roller bearing ring (10) includes multiple rolling elements (14) having two rows (16,18) that are spaced apart on the cage pockets (20) of the bearing cage, and are supported by the rolling bearing cage through a radially circumferential projection (22) cooperating with the groove. The projection is formed on the bearing cage between the rows of the cage pockets containing rolling elements. An independent claim is included for a speed gear for a motor vehicle transmission.

Description

The present invention relates to a rolling bearing with a roller bearing cage and with a formed on a raceway of an inner ring, radially encircling groove. The invention further relates to a Losradlagerung for a motor vehicle transmission. About at least one rolling bearing, which has an inner ring, the idler gear is mounted on a gear shaft. The inner ring has formed on a raceway a radially circumferential groove.

Both in the rolling bearing and in the Losradlagerung for a motor vehicle transmission in a rolling bearing ring a plurality of rolling elements in a first row and a second row in spaced-apart cage pockets of the rolling bearing cage are supported by rolling. A radially encircling projection on the roller bearing cage cooperates with the radially circumferential groove.

Background of the invention

Generic rolling bearing having an inner ring as a raceway for the rolling bearing cage, have so far brought the disadvantages that during assembly and during transport of the rolling bearing cage with the inner ring difficult or not can be held together. So it is then during transport often to slipping of the rolling bearing cage of the inner ring. The problem with this is that when transporting several rolling bearings are always in a box, so that it comes to mixing of various rolling bearing components. A subsequent sorting of the separated rolling bearing components is not possible, since always each roller bearing cage is made with the inner ring and rolling held in the cage pockets rolling elements to exact degree of Außenhüllkreises. Due to the consequent rejection of rolling bearing components, immense costs arise.

An initially described generic rolling bearing is in the German Offenlegungsschrift DE 39 17 759 A1 discloses in which a roller bearing cage on the radially circumferential projection at one end of the rolling bearing cage cooperates with a radially on a raceway of the inner ring groove. In this way, the inner ring and the roller bearing cage are held captive to each other, so that after assembly of the rolling bearing of the roller bearing cage and the inner ring during transport can not fall apart and can be installed in other units as a unit.

Likewise, known Losradlagerungen for motor vehicle transmission, which store a loose wheel on the transmission shaft via a roller bearing, brought similar disadvantages. Especially with an assembly, it is difficult or not possible to hold the idler gear and a rolling bearing ring together.

This is how the European patent specification describes EP 1 409 892 B1 a Losradlagerung for a motor vehicle transmission, wherein the idler gear is mounted on a rolling bearing with two spaced rolling bearing rings. Both rolling bearing cages engage, each with a radially circumferential projection in a groove which is arranged in a radially inwardly facing center of a toothing of the idler gear between the outer raceways of the rolling bearing rings. Thus, the gear and the rolling bearing rings are also held captive to each other, so that cooperate with a mounting of the rolling bearing in the Losradlagerung the gear and the rolling bearing rings as a structural unit.

A disadvantage of the aforementioned prior art is that either a trained at one end projection or two projections on the rolling bearing cage complicate a mounting of such a rolling bearing considerably, since the projection or the projections when pushing the rolling bearing cage on the inner ring after a prolong the assembly process in the groove. With more than one projection, the assembly is complicated by the fact that the resistance is increased when pushed out by the friction.

The invention has for its object to provide a roller bearing cage, which ensures a captive seat for a rolling bearing during a bearing during transport and thus reduces scrap costs and still allows a quick, easy and easy assembly and installation of a rolling bearing.

The object is achieved by a rolling bearing according to claim 1.

Furthermore, the invention has for its object to provide a Losradlagerung for a motor vehicle transmission, in which a rolling bearing is fast, easy and easy to build.

This object is achieved by a Losradlagerung for a motor vehicle transmission according to claim 6.

The roller bearing cage of the rolling bearing according to the invention comprises an inner ring and a roller bearing ring. On a raceway of the inner ring a radially circumferential groove is formed. In the rolling bearing ring, a plurality of rolling elements in a first row and a second row in spaced-apart cage pockets of the rolling bearing cage are supported in a rolling manner. In particular acts on the rolling bearing cage radially encircling Projection with the radial circumferential groove together. The roller bearing cage according to the invention is characterized in that the projection is formed on the rolling bearing cage between the first and the second row of held in the cage pockets rolling elements.

It should be noted that the rolling bearing cage according to the invention can also be designed as a slotted roller bearing cage. Slotted roller bearing cages are characterized by the fact that the rolling bearing cage can be easily expanded elastically so that it can be mounted better on a shaft.

According to a first embodiment, the projection is rectangular. According to a second embodiment, the projection is formed semicircular. A still further embodiment provides that the projection is rounded.

In a further preferred embodiment, the projection is elastic. This has the advantage that when mounting the elastic projection formed on the rolling bearing cage deforms so that the rolling bearing ring is simple, i. with little effort, and without damage to the inner ring can be pushed.

Advantageously, the roller bearing cage made of plastic. Plastic roller bearing cages are characterized by a favorable combination of strength and elasticity. The good sliding properties of plastic on lubricated steel surfaces and the low roughness of the roller bearing cage surfaces at the contact points with the rolling elements have a low rolling bearing cage friction, a correspondingly low heat development in the bearing and a hardly measurable wear result. Because of the low material density and the forces from the inertia of the rolling bearing cage remain small.

In particular, the rolling bearing described in the embodiments is a needle bearing and the rolling bearing ring has a double row rolling bearing cage. Since the radial height of needle rings only corresponds to the diameter of the needle rollers as rolling elements, they allow storage with minimal space. They are load-bearing, suitable for high speeds and very easy to install.

An advantage of the rolling bearing cage according to the invention is that by the interaction of projection and groove a captive seat, v. a. during transport, created for a rolling bearing ring of a rolling bearing. Another advantage of the rolling bearing cage according to the invention is that during assembly of the rolling bearing ring with little effort on the inner ring due to the elastic configuration of the projection can be pushed. But above all, the rolling bearing ring is also fast, easy and easily pushed onto the inner ring, since the radially encircling groove of the inner ring between the first and the second row of held in the cage pockets, d. H. approximately centrally in the inner ring, is formed.

Typical of loose-wheel bearings is that the roller bearings rotate in almost unloaded condition and do not rotate under load. This is because the idler gears are permanently engaged with a driven gear of an opposite gear shaft. If the idler gear is not coupled with the gear shaft on which it is seated, it is dragged along at a relative speed to the gear shaft and is mounted in rotation on the gear shaft via the idler gear bearing. Only when the idler gear is coupled to the shaft, torques are transmitted from the driven gear via the idler gear to the transmission shaft. For this purpose, the idler gear is coupled rotationally fixed via a synchronizer clutch with the gear shaft. The idler bearing supports the idler gear on the gear shaft almost at standstill. In Losradlagerungen the slot is provided in the rolling bearing cage, for example, as a possible means which promotes the rotative migration of the cage in these operating conditions and avoids the stoppage to prevent corrugations.

The Losradlagerung invention for a motor vehicle transmission supports at least one roller bearing a loose wheel on a transmission shaft. The rolling bearing has an inner ring which has a radially circumferential groove on a raceway. In a rolling bearing ring, a plurality of rolling elements in a first row and a second row in spaced-apart cage pockets of the rolling bearing cage are supported by rolling, wherein a roller bearing cage on the radially circumferential projection cooperates with the radially circumferential groove. The Losradlagerung invention for a motor vehicle transmission is characterized in that the projection on the roller bearing cage between the first and the second row of held in the cage pockets Wälzkörper is formed.

The rolling bearing with the rolling bearing cage is fast, easy and easy to install according to this Losradlagerung for a motor vehicle transmission, since the bearings already guaranteed a captive seat of a rolling bearing cage on an inner ring during transport, so that all rolling bearing components can be installed as a unit. In addition, only a projection on the roller bearing cage is provided, so that the force required during assembly is low.

In the following, embodiments of the invention and their advantages with reference to the accompanying figures will be explained in more detail. The proportions in the figures, the figures do not always correspond to the actual size ratios, as some shapes are simplified and other shapes are shown enlarged in relation to other elements for ease of illustration. Showing:

1 a schematic representation of a rolling bearing according to the invention;

2 an enlarged view of the embodiment of the radial circumferential projection according to the invention on the roller bearing cage 1 ;

3 a schematic side view of a Losradlagerung invention for a motor vehicle transmission,

4 a detailed view after 3 in which a radially circumferential projection of the roller bearing cage cooperates with the radially encircling groove of the inner ring.

For identical or equivalent elements of the invention, identical reference numerals are used. Furthermore, for the sake of clarity, only reference symbols are shown in the individual figures, which are required for the description of the respective figure. The illustrated embodiments are merely examples of how the rolling bearing cage according to the invention for a rolling bearing and the Losradlagerung invention can be configured for a motor vehicle transmission and thus do not constitute a final limitation of the invention.

1 shows a schematic representation of a rolling bearing according to the invention 1 who has an inner ring 3 and a rolling bearing ring 10 with a rolling bearing cage 12 includes. In particular, the rolling bearing cage 12 preferably made of plastic. At a career 7 of the inner ring 3 is a radial circumferential groove 5 educated. In the rolling bearing cage 12 are a variety of rolling elements 14 in a first row 16 and a second row 18 in spaced cage pockets 20 of the rolling bearing cage 12 rolling on spaced cage bags 20 of the rolling bearing cage 12 rollingly supported. One at the rolling bearing cage 12 radial circumferential projection 22 acts with the radial circumferential groove 5 together so that a captive seat of the rolling bearing cage 12 on the inner ring 2 is guaranteed. According to the invention, the projection 22 at the rolling bearing cage 12 between the first and the second row 16 . 18 the one in the cage pockets 20 supported rolling elements 14 educated. The radial circumferential groove 5 of the inner ring 2 is between the first and the second row 16 . 18 the one in the cage pockets 20 supported rolling elements 14 educated. It is of particular advantage when the projection 22 in the middle between the first and the second row 16 . 18 the one in the cage pockets 20 supported rolling elements 14 is formed. For one thing, the projection takes hold 22 already after halfway into the groove 5 one when the rolling bearing cage 12 on the inner ring 2 on the other hand is due to the symmetrical mass distribution of the rolling bearing cage 12 a sufficiently good and also symmetrical distribution of forces of the rolling bearing 1 given during operation. Thus, the rolling bearing ring 10 quick, easy and easy on the inner ring during assembly 2 be deferred.

As in 1 , shown in a preferred embodiment, is the rolling bearing 1 a needle bearing and the rolling bearing ring 10 has a double row needle ring, wherein the rolling bearing cage according to the invention 12 with the inner ring 2 also for other rolling bearings 1 is conceivable.

2 an enlarged view of the embodiment of the radial circumferential projection according to the invention 22 at the rolling bearing cage 12 out 1 , In the embodiment shown here, the projection 22 rectangular.

Irrelevant, whether the lead 22 is formed rectangular or semicircular, is the projection 22 or the structure of the rolling bearing cage following the projection 12 preferably formed elastically. When mounting the projection springs 22 elastic back, leaving the rolling bearing ring 10 with little effort, on the inner ring 2 is deferrable.

3 shows a schematic side view of a Losradlagerung invention for a motor vehicle transmission 30 that at least one about a rolling bearing 1 with an inner ring 3 (please refer 4 ) who is on a career path 7 (see also 4 ) a radially circumferential groove 5 (see also 4 ), on a transmission shaft 34 stored loose wheel 32 has.

4 a detailed view after 3 , wherein in a rolling bearing ring 10 of the rolling bearing 1 a variety of rolling elements 14 in a first row 16 and a second row 18 in spaced cage pockets 20 of the rolling bearing cage 12 are held rolling and one on Wälzlagerkäfig 12 radial circumferential projection 22 the with the radial circumferential groove 5 interacts. According to the invention, the projection 22 at the rolling bearing cage 12 between the first and the second row 16 . 18 the one in the cage pockets 20 salient Wälzkörpern trained. The rolling bearing cage 12 with the elements, as already in the 1 and 2 described trained.

LIST OF REFERENCE NUMBERS

1

 roller bearing

3

 inner ring

5

 groove

7

 career

10

 Rolling ring

12

 Rolling bearing cage

14

 rolling elements

16

 first row of rolling elements

18

 second row of rolling elements

20

 cage pocket

22

 head Start

20

 Motor vehicle transmission

32

 Losrad

34

 gear shaft

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 3917759 A1 [0004]
• EP 1409892 B1 [0006]

Claims (7)

Roller bearing ( 1 ) with a roller bearing cage ( 12 ) and with one on a career ( 7 ) of an inner ring ( 3 ) formed, radially circumferential groove ( 5 ), with a rolling bearing ring ( 10 ), in which a plurality of rolling elements ( 14 ) in a first row ( 16 ) and a second row ( 18 ) in spaced-apart cage pockets ( 20 ) of the roller bearing cage ( 12 ) are mounted rolling and one on Wälzlagerkäfig ( 12 ) radially circumferential projection ( 22 ) with the radial circumferential groove ( 5 ), characterized in that the projection ( 22 ) on the roller bearing cage ( 12 ) between the first and second rows ( 16 . 18 ) in the cage pockets ( 20 ) supported rolling elements ( 14 ) is trained. Rolling bearing cage ( 12 ) according to claim 1, wherein the projection ( 22 ) is rectangular, half-round or rounded. Rolling bearing cage ( 12 ) according to one of claims 1 or 2, wherein the projection ( 22 ) is elastic. Rolling bearing cage ( 12 ) according to claim 1 to 3, wherein the rolling bearing cage ( 12 ) is made of plastic. Rolling bearing cage ( 12 ) according to one of claims 1 to 4, wherein the rolling bearing ( 1 ) is a needle bearing, as a rolling bearing ring ( 10 ) has a double row needle ring. Losradlagerung for a motor vehicle transmission ( 30 ), at least one via a rolling bearing ( 1 ) on a gear shaft ( 34 ) stored loose wheel ( 32 ), wherein the rolling bearing ( 1 ) an inner ring ( 3 ) on a track ( 7 ) a radially encircling groove ( 5 ), wherein in a rolling bearing ring ( 10 ) of the rolling bearing ( 1 ) a plurality of rolling elements ( 14 ) in a first row ( 16 ) and a second row ( 18 ) in spaced-apart cage pockets ( 20 ) of the roller bearing cage ( 12 ) are mounted rollingly and wherein at the rolling bearing cage ( 12 ) a radially encircling projection ( 22 ) is formed, which with the radial circumferential groove ( 5 ), characterized in that the projection ( 22 ) on the roller bearing cage ( 12 ) between the first and second rows ( 16 . 18 ) in the cage pockets ( 20 ) supported rolling elements ( 14 ) is trained. Losradlagerung for a motor vehicle transmission ( 3 ) according to claim 6, wherein the rolling bearing cage ( 12 ) is designed according to one of claims 2 to 5.

Images